Unicode C++

Convert ASN.1 to/from Binary DER, XML, and Base64

Demonstrates how to convert ASN.1 from and to any of the following formats: binary DER, Base64, and XML. Unicode C++

#include <CkAsnW.h>
#include <CkXmlW.h>

void ChilkatSample(void)
    {
    bool success = false;

    CkAsnW asn;

    //  Begin with loading ASN.1 from a binary DER/BER format file.
    success = asn.LoadBinaryFile(L"/Users/chilkat/testData/p7b/test.p7b");
    if (success != true) {
        wprintf(L"%s\n",asn.lastErrorText());
        return;
    }

    //  Convert ASN.1 to XML:
    const wchar_t *strXml = asn.asnToXml();
    if (asn.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",asn.lastErrorText());
        return;
    }

    //  The XML returned by AsnToXml will be compact and not pretty-formatted.
    //  Use Chilkat XML to format the XML better:
    CkXmlW xml;
    success = xml.LoadXml(strXml);
    //  Assuming success for this example..
    //  This is formatted better for human viewing:
    wprintf(L"%s\n",xml.getXml());

    //  Now get the ASN.1 in base64 format.  Any encoding supported
    //  by Chilkat can be passed, such as "hex", "uu", "quoted-printable", "base32", "modbase64", etc.
    const wchar_t *strBase64 = asn.getEncodedDer(L"base64");

    //  Load the ASN.1 from XML:
    CkAsnW asn2;
    success = asn2.LoadAsnXml(xml.getXml());
    if (success != true) {
        wprintf(L"%s\n",asn2.lastErrorText());
        return;
    }

    //  Load the ASN.1 from an encoded string, such as base64:
    CkAsnW asn3;
    success = asn3.LoadEncoded(strBase64,L"base64");
    if (success != true) {
        wprintf(L"%s\n",asn3.lastErrorText());
        return;
    }
    }